How do you get the thunder gun evary time?

Answer 1

NOT EVERY TIME, but 50% chance this way.

When you are starting the game, KEEP YOUR PISTOL!! Many people trade it out in the early rounds or when its out of ammo. Make sure you have ammo for it. When you open the box, follow these steps:

1) Jump turning around

2) Shoot forward immediately

3) Wait for box

You will have a 50% chance of getting Ray Gun or Thunder Gun. GETTING RAY GUN OR THUNDER GUN WILL MAKE GETTING THE OTHER ONE EVEN MORE RARER.

I tried this on PS3 and it worked.

Remember, The Thunder Gun is only available in Kino der Toten, Ascension and Nacht der Untoten!